3/8-16 X 4 Inch Hot Dip Galvanized Carriage Bolt Kit Grade 307A With 50 Flat Washers And 50 Hex Nuts For Exterior Use Beefy All Weather Heavy Duty Outdoor Hardware Kit

4-Inch 3/8-16 Carriage Bolt Kit, Galvanized for Outdoors
✔️ Coarse thread, Grade 307A, 60k PSI min, kit: 50 washers + 50 nuts

These hot-dip galvanized carriage bolts provide a strong, snag-free fastener for exterior wood-to-wood or wood-to-metal connections. They excel in decks, fences, and outdoor structures where durability and corrosion resistance matter.

✅ 3/8-16 x 4 in carriage bolts with full thread
✅ Hot-dip galvanized finish for superior outdoor corrosion resistance
✅ Grade 307A steel for heavy-duty exterior use
✅ Coarse thread for fast and easy driving into wood
✅ Kit includes 50 flat washers and 50 hex nuts
✅ Coating thickness: 43 microns (0.0017 in) up to 3/8 in; 50 microns (0.0020 in) over 3/8 in
✅ Meets ASTM F2329/F2329M and ASTM A153/A153M; RoHS compliant

💡 What is a carriage bolt used for and why is hot-dip galvanized hardware a good choice?

Handy for exterior framing where a smooth, snag-free finish matters.

- Carriage bolts fasten wood to wood or wood to metal
- Galvanized coating resists rust in outdoor environments
- Square neck prevents turning during tightening
- Ideal for decks, fences, and other exterior structures